LT1-LT4 Modifications 1993-97 Gen II Small Block V8

What route to go with my LT1

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Old 05-13-2010, 10:45 AM
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Default What route to go with my LT1

I live in California and around here the smog people are real picky about my car. I want to start getting more into my motor to squeeze as much horsepower as possible but still be a good driver since its my DD. So far whats done to the car is the LS1 WS6 base with slp lid, LT4 Knock Module, Flowmaster mufflers, Performabuilt trans with higher stall and various suspension mods. I want to do long tube headers but I know it will not pass the smog inspection.
Old 05-13-2010, 10:47 AM
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Honestly if it's your DD I wouldn't do anything more than bolt ons.

Since yours is a 94 at least your "shorty" headers are halfway decent, more like mid lengths.
Old 05-13-2010, 10:51 AM
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Originally Posted by 94T/A5.7LT1
I live in California and around here the smog people are real picky about my car. I want to start getting more into my motor to squeeze as much horsepower as possible but still be a good driver since its my DD. So far whats done to the car is the LS1 WS6 base with slp lid, LT4 Knock Module, Flowmaster mufflers, Performabuilt trans with higher stall and various suspension mods. I want to do long tube headers but I know it will not pass the smog inspection.
So you want your cake and you want to be able to eat it too?

If I was in your shoes, I would look into a small wet shot and be done with it. You can remove the solenoids/lines when you go in to get smogged, but still have power on tap when you want it. With a properly running car and nitrous kit (with the correct safety equipment) you can get quite a few miles of enjoyment out of the car without compromising too much reliability.

As far as attempting to get power any other way, you will need to talk to locals and see what cam swaps are smog friendly. I would venture to say the LT4 Hot Cam Kit would possibly pass smog, but you would probably want to do your own digging on what would work best.
Old 05-13-2010, 12:02 PM
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Well to be honest i figured it was going to be very limited but thought i would ask anyways. Who doesnt want their cake and to be able to eat it too? I thought about going with the nitrous set up but I want the power all the time not only when I push a button. I also thought of a supercharger kit but with 118,xxx miles not sure how much longer it would last plus my wallet wont allow it for awhile.
Old 05-13-2010, 06:05 PM
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Originally Posted by WhyHelloOfficer
So you want your cake and you want to be able to eat it too?

If I was in your shoes, I would look into a small wet shot and be done with it. You can remove the solenoids/lines when you go in to get smogged, but still have power on tap when you want it. With a properly running car and nitrous kit (with the correct safety equipment) you can get quite a few miles of enjoyment out of the car without compromising too much reliability.

As far as attempting to get power any other way, you will need to talk to locals and see what cam swaps are smog friendly. I would venture to say the LT4 Hot Cam Kit would possibly pass smog, but you would probably want to do your own digging on what would work best.
You can pass smog with a bigger cam than a hotcam. Maybe as big as cc306
Old 05-13-2010, 06:07 PM
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Originally Posted by 94T/A5.7LT1
Well to be honest i figured it was going to be very limited but thought i would ask anyways. Who doesnt want their cake and to be able to eat it too? I thought about going with the nitrous set up but I want the power all the time not only when I push a button. I also thought of a supercharger kit but with 118,xxx miles not sure how much longer it would last plus my wallet wont allow it for awhile.
supercharging is probably your best bet for power in CA. Just start upgrading parts a few pieces at a time. Get some bolt ons (including a Dana 60, ford 9", or 12 bolt) and fuel system parts etc so you don't have to buy all that stuff at once.
Old 05-13-2010, 06:22 PM
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Originally Posted by Z28Roxy
You can pass smog with a bigger cam than a hotcam. Maybe as big as cc306
not a chance, the biggest you can pass smog with is 220/230 range on a 112 lsa. I run a lunati 60121 with success at the smog shop
Old 05-13-2010, 10:54 PM
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Originally Posted by Z28Roxy
You can pass smog with a bigger cam than a hotcam. Maybe as big as cc306
You will you have pull every emission trick know to man to pull this off.
Old 05-13-2010, 10:58 PM
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Originally Posted by JB_97ws6TA
not a chance, the biggest you can pass smog with is 220/230 range on a 112 lsa. I run a lunati 60121 with success at the smog shop
That's basically a hotcam
Old 05-14-2010, 07:36 AM
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What is so different about the '94 Shortie headers? I'm running BBK's on mine and have been told that that shortie headers really kill performance but I've been pretty happy with mine.

Originally Posted by Z28Roxy
Honestly if it's your DD I wouldn't do anything more than bolt ons.

Since yours is a 94 at least your "shorty" headers are halfway decent, more like mid lengths.
Old 05-14-2010, 11:26 AM
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Originally Posted by Jazz-LT1
What is so different about the '94 Shortie headers? I'm running BBK's on mine and have been told that that shortie headers really kill performance but I've been pretty happy with mine.
The real downside of ST headers is how hard most of them are to install. I used to have ST for emissions but that's long gone now.
Old 05-14-2010, 12:56 PM
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I really wish I could run long tubes but I wanted my car lower and its more for autocross that drag racing. My numbers don't seem to show a huge loss with the shorties tho.
Old 05-14-2010, 01:01 PM
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I find that long tubes only hurt your ground clearance if they have 3-bolt flanges. My LPPs tuck quite nicely. Having band clamps as opposed to flanges really helps. That extra 1/2" is nice.
Old 05-14-2010, 01:03 PM
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Originally Posted by RamAir95TA
I find that long tubes only hurt your ground clearance if they have 3-bolt flanges. My LPPs tuck quite nicely. Having band clamps as opposed to flanges really helps. That extra 1/2" is nice.
i agree. band clamps FTW. espically when lowered.
Old 05-14-2010, 01:38 PM
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Well, at this point I'm trying to save for a Corvette, so I can't see dropping another $500 on exhaust. Nice to know though.
Old 05-14-2010, 01:44 PM
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Not to be off topic but I dont see how you guys have any fun over there. I would move.
Old 05-14-2010, 02:01 PM
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I cant go Long tubes because my car is lowered and there is a lot of pot holes and spped bumps is San Jose. Whats your guys opinions on shortys/mids? Anything got to be batter the the factory cast manifolds
Old 05-14-2010, 06:06 PM
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Originally Posted by Jazz-LT1
What is so different about the '94 Shortie headers? I'm running BBK's on mine and have been told that that shortie headers really kill performance but I've been pretty happy with mine.
Shorty headers for a 94s are basically mid-lengths. Shorties for 96-97 are ridiculous, so many bends in the driver's side....

95 is the bastard child year, some use the 96-97 style, some use the 94 style.



vs

Old 05-14-2010, 06:07 PM
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Originally Posted by 94T/A5.7LT1
I cant go Long tubes because my car is lowered and there is a lot of pot holes and spped bumps is San Jose. Whats your guys opinions on shortys/mids? Anything got to be batter the the factory cast manifolds
My pacesetter LTs tuck up fine. I will be lowering my car with them. Even running true duals.
Old 05-15-2010, 04:26 AM
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Well I know I've heard of guys in California passing in cali with hotcams and larger, but I imagine JB knows a little more about it than I do. A lingenfelter 211/219 would for sure give no problems with emissions and is a nice baby cam. Lots of low end grunt. There was another small cam by Crane but I believe they went out of business. Longtube headers with all of the emissions stuff still hooked up will not give you any trouble on a sniffer, but may cause you to fail the visual. It all depends on how picky the tech is. If you want to be sure you will have no trouble, then mid-length headers with a good catted Y with high flow cats would be about the best compromise. Pretty good performance and 100% legal.

Last edited by nighthawk15; 05-15-2010 at 04:33 AM.


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